Observation of Two Nondispersive Magnetic Excitations in NiO by Resonant Inelastic Soft-X-Ray Scattering

@article{ ISI:000262535900068,
Author = {Ghiringhelli, G. and Piazzalunga, A. and Dallera, C. and Schmitt, T. and
   Strocov, V. N. and Schlappa, J. and Patthey, L. and Wang, X. and Berger,
   H. and Grioni, M.},
Title = {{Observation of Two Nondispersive Magnetic Excitations in NiO by Resonant
   Inelastic Soft-X-Ray Scattering}},
Journal = {{PHYSICAL REVIEW LETTERS}},
Year = {{2009}},
Volume = {{102}},
Number = {{2}},
Month = {{JAN 16}},
Abstract = {{We present high resolution (Delta E=120 meV) resonant inelastic x-ray
   scattering data measured at the Ni L-3 edge (2p(3/2)-> 3d) on the
   paradigmatic antiferromagnetic oxide NiO. Spectra reveal clear
   signatures of magnetic excitations at similar to 95 and similar to 190
   meV whose energy seems independent from transferred momentum. These
   spectral features are well reproduced by a single Ni2+ ion model in an
   effective exchange field. Within this local model the two magnetic
   excitations are characterized by a variation of the atomic magnetic
   moment along the local ordering direction (Delta S-alpha) of one and two
   units. The Delta S-alpha=2 case has different nature from bimagnons
   observed in optical Raman spectra, for which Delta S-alpha=0.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Ghiringhelli, G (Corresponding Author), Politecn Milan, Dipartimento Fis, CNR INFM Coherentia & Soft, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
   Ghiringhelli, G.; Piazzalunga, A.; Dallera, C., Politecn Milan, Dipartimento Fis, CNR INFM Coherentia & Soft, I-20133 Milan, Italy.
   Schmitt, T.; Strocov, V. N.; Schlappa, J.; Patthey, L., Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
   Wang, X.; Berger, H.; Grioni, M., Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland.}},
DOI = {{10.1103/PhysRevLett.102.027401}},
Article-Number = {{027401}},
ISSN = {{0031-9007}},
EISSN = {{1079-7114}},
Keywords-Plus = {{OPTICAL-ABSORPTION; RAMAN-SCATTERING; WAVE DISPERSION}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
ResearcherID-Numbers = {{Patthey, Luc/G-6130-2018
   Ghiringhelli, Giacomo/D-1159-2014
   Schmitt, Thorsten/A-7025-2010}},
ORCID-Numbers = {{Patthey, Luc/0000-0001-6101-8069
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   }},
Funding-Acknowledgement = {{Swiss NSFSwiss National Science Foundation (SNSF); NCCR MaNEPSwiss
   National Science Foundation (SNSF)}},
Funding-Text = {{This work was performed at the ADRESS beam line of the SLS ( PSI) using
   the SAXES spectrometer developed jointly by Politecnico di Milano, SLS,
   and EPFL. Technical support by M. Kropf and J. Krempasky and all the SLS
   staff is gratefully acknowledged. Work at the EPFL is supported by the
   Swiss NSF and by the NCCR MaNEP. G. G. is indebted to L. Braicovich, J.
   van den Brink, and L. Ament for illuminating discussions.}},
Number-of-Cited-References = {{22}},
Times-Cited = {{55}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{25}},
Journal-ISO = {{Phys. Rev. Lett.}},
Doc-Delivery-Number = {{395PL}},
Unique-ID = {{ISI:000262535900068}},
OA = {{Green Accepted}},
DA = {{2020-12-22}},
}